:root {
    font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 24px;
    font-weight: 400;

    color-scheme: light dark;
    color: rgba(255, 255, 255, 0.87);
    background-color: #242424;

    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
}

h1 {
    font-size: 3.2em;
    line-height: 1.1;
}

.card {
    padding: 2em;
}


#app {
    width: 100vw;
    height: 100vh;
    background-color: #1a1a1a;
    color: #1a1a1a;
    overflow: hidden;
}

body {
    margin: 0;
    display: flex;
    place-items: center;
    min-width: 320px;
    min-height: 100vh;
}

.contain-box {
    padding: 15px;
    width: calc(100% - 30px);
    height: calc(100% - 30px);
}

.inner-pos(center) {justify-content: center}
.inner-pos(between) {justify-content: space-between}
.inner-pos(around) {justify-content: space-around}
.inner-pos(none) {}
.inner-pos(@_) {
    display: flex;
    align-items: center;
}

.btn-no-border {
    border: none;
    outline: none;
}
